南京长江第四大桥航行条件数值模拟研究

Numerical Simulation on Navigation Condition of Nanjing Fourth Bridge on Changjiang River

结合二维水流数学模型和船舶运动数学模型,研究了拟建南京长江第四大桥对通航水流条件的影响,分析了桥墩周围的水流条件变化,模拟了船队在建桥前后通过桥区河段的航迹线,得到了航行过程中的航行参数,综合分析认为南京四桥修建对通航水流条件影响很小,对船舶航行也无明显影响。

The numerical model, which combines the two - dimensional river model and ship maneuvering mathematical model, is built. The influence of Nanjing Fourth Bridge to be built across the Changjiang River on river＇s condition is studied. The change of river conditions around the Bridge pier is analyzed and the tracks of ship transit along the reach of the Changjiang River are simulated for the cases of before and after building the Nanjing Fourth Bridge. The parameters of navigation in sail course have been obtained. The result shows that the influence on rivers condition of the Nanjing Fourth Bridge on Changjiang River is very small, and its influence on navigation is not significant.